Answers

2015-07-09T21:15:46+05:30
While running his legs pain because carbondioxide will increases in his leg muscles
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2015-07-09T21:20:31+05:30


His leg muscles will pain while he is running, because lactic acid builds up, and they also  get stretched, and so do the leg muscles, which causes pain. Your legs may hurt after a day or two after running, because they are making the adjustment to your new activity.

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